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5 Different Ways to Flatten a List of Lists in Python

Dec 12, 202012 min read

In this post, we’ll see how we can flatten a list in 5 different ways. Each method has pros and cons, and varied performance. By the end of this tutorial, I hope you’ll be able to identify the most appropriate solution for your problem. The Python ve...

Design Patterns That Make Sense in Python: Simple Factory

Dec 5, 202010 min read

In the first post of this series, I'll talk about Design Patterns that make sense in Python. We'll see how to implement them and how they are used in the standard library and other third-party packages. In this post, we'll go over the Simple Factory ...

How to Pass Multiple Arguments to a map Function in Python

Nov 28, 202010 min read

In this post, I’m going to show what I do to map a function that expects multiple arguments. The solutions work not only for the regular map function, you can also use the trick to pass multiple parameters to concurrent.futures.Executor.map and multi...

How to Use Fixtures as Arguments in pytest.mark.parametrize

Nov 21, 20206 min read

In this post, we'll see how we can use fixtures as arguments of pytest.mark.parametrize. This is a long-wanted feature that dates back to 2013. Even though pytest doesn't support it yet, you'll see that we can actually make it happen. Problem Suppose...

How to Use datetime.timedelta in Python With Examples

Nov 14, 202011 min read

In this tutorial, you'll learn how to use datetime.timedelta to perform date arithmetic. With timedelta you can add days, minutes, seconds, hours, weeks and many more to a datetime.date or a datetime.datetime object. Table of Contents Adding Seconds...

73 Examples to Help You Master Python's f-strings

Nov 7, 202024 min read

In this post, I'll show you what I consider the most important bits about Python's f-strings. You will learn several different ways to format a string using f-strings, completely guided by examples. In total, you'll see 73 examples on how to make the...